#region Using Directives and Copyright Notice

// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the Computer Consultancy Pty Ltd nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.

using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;

#endregion

namespace Interlace.Network
{
    public class PointerDnsRecord : DnsRecord
    {
        string _pointerName;

        public PointerDnsRecord(string name, int ttl)
        : base(name, DnsApi.DNS_RECORD_FLAGS_CHARSET_UNICODE, ttl)
        {
            _pointerName = null;
        }

        public PointerDnsRecord(string name, int ttl, string pointerName)
        : this(name, ttl)
        {
            _pointerName = pointerName;
        }

        public string PointerName
        { 	 
           get { return _pointerName; }
           set { _pointerName = value; }
        }

        internal static PointerDnsRecord Unmarshal(IntPtr recordPointer)
        {
            IntPtr data = DnsRecordChain.GetDataPointer(recordPointer);
            DnsApi.DnsRecordHeader header = DnsRecordChain.GetHeader(recordPointer);

            PointerDnsRecord record = new PointerDnsRecord(Marshal.PtrToStringUni(header.pName), (int)header.dwTtl);
            record._pointerName = Marshal.PtrToStringUni(Marshal.ReadIntPtr(data, 0));

            return record;
        }

        internal override void MarshalToChain(DnsRecordChain chain)
        {
            IntPtr record = MarshalBase(chain, DnsApi.DNS_TYPE_TEXT, (ushort)Marshal.SizeOf(typeof(IntPtr)));
            IntPtr recordData = DnsRecordChain.GetDataPointer(record);

            Marshal.WriteIntPtr(recordData, 0, chain.AllocatePoolUnicodeString(_pointerName));
        }
    }
}
